ABAP Select data from SAP table IMAKPS_M into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IMAKPS_M table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to IMAKPS_M. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the IMAKPS_M table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_IMAKPS_M TYPE STANDARD TABLE OF IMAKPS_M,
      WA_IMAKPS_M TYPE IMAKPS_M,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <IMAKPS_M> TYPE IMAKPS_M.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IMAKPS_M.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IMAKPS_M
  INTO TABLE IT_IMAKPS_M.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMAKPS_M
*  INTO TABLE @DATA(IT_IMAKPS_M2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_IMAKPS_M INDEX 1 INTO DATA(WA_IMAKPS_M2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IMAKPS_M ASSIGNING <IMAKPS_M>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMAKPS_M>-MANDT = 1.
<IMAKPS_M>-POSNR = 1.
<IMAKPS_M>-ASPART = 1.
<IMAKPS_M>-APROZ = 1.
<IMAKPS_M>-ASPART1 = 1.

ENDLOOP.

LOOP AT IT_IMAKPS_M INTO WA_IMAKPS_M.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMAKPS_M-APROZ1, sy-vline,
  WA_IMAKPS_M-ASPART2, sy-vline,
  WA_IMAKPS_M-APROZ2, sy-vline,
  WA_IMAKPS_M-ASPART3, sy-vline,
  WA_IMAKPS_M-APROZ3, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_IMAKPS_M you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_IMAKPS_M TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_IMAKPS_M INTO WA_IMAKPS_M.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit REQNR, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_REQNR_OUTPUT'
  EXPORTING
    input =                      WA_IMAKPS_M-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAKPS_M-POSNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_IMAKPS_M_STR, 
MANDT TYPE STRING,
POSNR TYPE STRING,
ASPART TYPE STRING,
APROZ TYPE STRING,
ASPART1 TYPE STRING,
APROZ1 TYPE STRING,
ASPART2 TYPE STRING,
APROZ2 TYPE STRING,
ASPART3 TYPE STRING,
APROZ3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMAKPS_M_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_IMAKPS_M_STR-MANDT sy-vline 
WA_IMAKPS_M_STR-POSNR sy-vline 
WA_IMAKPS_M_STR-ASPART sy-vline 
WA_IMAKPS_M_STR-APROZ sy-vline 
WA_IMAKPS_M_STR-ASPART1 sy-vline 
WA_IMAKPS_M_STR-APROZ1 sy-vline 
WA_IMAKPS_M_STR-ASPART2 sy-vline 
WA_IMAKPS_M_STR-APROZ2 sy-vline 
WA_IMAKPS_M_STR-ASPART3 sy-vline 
WA_IMAKPS_M_STR-APROZ3 sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.